SDL_JoyAxisEvent is a member of the SDL_Event union and is used when an event of type SDL_JOYAXISMOTION is reported.

A SDL_JOYAXISMOTION event occurs when ever a user moves an axis on the joystick. The field which is the index of the joystick that reported the event and axis is the index of the axis (for a more detailed explaination see the Joystick section). value is the current position of the axis.